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Real-time pollen data for Port St. Lucie — updated daily.
Port St. Lucie's subtropical location on Florida's Treasure Coast means tree pollen season starts earlier and lasts longer than in northern states. Oak is the dominant tree allergen — live oak, laurel oak, and water oak are ubiquitous across Port St. Lucie's residential neighborhoods, parks, and natural areas, producing massive pollen loads from February through April that coat every outdoor surface with yellow-green powder. Pine trees contribute significant pollen from January through April — slash pine and longleaf pine are native to the sandy uplands and scrub habitats that originally covered the area before development. Australian pine (Casuarina), an invasive species established throughout the Treasure Coast and Indian River Lagoon shorelines, pollinates during winter months and produces pollen that triggers significant allergic reactions despite its name suggesting otherwise. Brazilian pepper tree, another aggressive invasive found throughout St. Lucie County, blooms from September through November and produces both airborne pollen and volatile oils related to the cashew family that cause contact dermatitis and respiratory irritation. Elm, maple, bayberry, cypress, melaleuca (paperbark tree), and palm species contribute additional tree pollen at various points throughout the year. The subtropical climate means some tree species pollinate in winter when northern residents expect relief.
Grass pollen is a major and extended allergen in Port St. Lucie. Bahia grass is the dominant lawn and pasture grass across St. Lucie County — it thrives in Florida's sandy soils and warm climate and produces heavy pollen loads from late spring through early fall. Bermuda grass is planted extensively in newer residential developments, athletic fields, and commercial landscapes. St. Augustine grass, the most common residential lawn grass in South Florida, produces less airborne pollen but still contributes to the overall allergen burden. The subtropical climate allows grasses to remain green and actively growing for 8 to 10 months of the year, unlike northern states where frost kills grass pollen production. Port St. Lucie's explosive residential growth has added thousands of acres of new sod — irrigated lawns in master-planned communities like Tradition and St. Lucie West create dense grass pollen sources that compound year after year. Paspalum and crabgrass contribute in unmaintained areas and along roadside margins.
Ragweed is the primary fall weed allergen in Port St. Lucie, with the season extending from August through November or even December due to the absence of killing frost. Florida's mild autumn means ragweed persists far longer than in northern states. Pigweed (amaranth) thrives in the sandy, disturbed soils created by Port St. Lucie's massive ongoing construction activity. Lamb's quarters, dock, and nettle contribute additional weed pollen. Marsh elder (Iva) and saltbush are present in coastal and lagoon-adjacent areas. Spanish needle and dog fennel are common roadside weeds that produce allergenic pollen. The extensive construction activity across Port St. Lucie's rapidly developing communities creates disturbed soil that pioneer weed species colonize aggressively, producing heavy pollen loads in areas adjacent to new residential developments.
Port St. Lucie's subtropical humidity is the defining indoor allergen factor. Average relative humidity exceeds 70 percent for much of the year, creating ideal conditions for dust mites, which thrive at humidity levels above 50 percent. Mold is a particularly significant challenge on the Treasure Coast — the combination of high humidity, frequent rainfall (averaging 55+ inches annually), warm temperatures, and proximity to the St. Lucie River estuary and Indian River Lagoon creates persistent mold exposure both indoors and outdoors. Common mold species including Alternaria, Cladosporium, Aspergillus, and Penicillium grow year-round in HVAC systems, bathrooms, under sinks, in attics, and anywhere moisture accumulates. Homes with screened-in lanais and pool enclosures — extremely common in Port St. Lucie — create semi-outdoor spaces where mold thrives on damp surfaces. Hurricane damage history (Frances, Jeanne, and Wilma all hit the area in 2004-2005) left hidden moisture in walls and structures that continues to support mold growth in older homes. Pet dander and cockroach allergen are significant perennial triggers.
Severity: Moderate to High
While northern states enjoy a winter allergy break, Port St. Lucie's subtropical climate means tree pollen begins in January. Australian pine, cypress, and elm release pollen during winter months. By February, oak pollen begins its explosive season that dominates through April. Pine pollen adds to the mix from January through March. Mold spores remain elevated year-round due to high humidity, but winter's slightly drier air provides modest relief. Many northern transplants who moved to the Treasure Coast expecting to escape allergies discover that Florida's winter tree pollen season is a new trigger they never experienced before.
Severity: High to Severe
Spring into early summer is Port St. Lucie's worst allergy period. Oak pollen peaks in March and April at extraordinary concentrations. Grass pollen rises sharply in April as Bahia, Bermuda, and St. Augustine grasses respond to warming temperatures and the beginning of the wet season. The onset of Florida's rainy season in late May brings thunderstorms that can trigger "thunderstorm asthma" — downdrafts concentrate pollen at ground level while humidity causes pollen grains to rupture into smaller, more deeply penetrating fragments. Rising humidity drives mold spore counts upward. The overlap of tree, grass, and mold allergens creates the year's most challenging multi-allergen exposure.
Severity: Moderate to High
Florida's summer wet season brings daily afternoon thunderstorms, extreme humidity often exceeding 80 percent, and temperatures in the low to mid 90s. Tree pollen subsides but grass pollen remains active through September. The dominant allergen shifts to mold — the combination of heat, humidity, frequent rain, and saturated soils creates ideal mold growing conditions throughout the Treasure Coast. Outdoor mold spores are ubiquitous. Indoor mold proliferates in air conditioning systems running continuously, with condensation on cooling coils providing persistent moisture. Ragweed begins in August. The hurricane season (June–November) adds the risk of structural water damage that creates long-term mold problems in affected homes.
Severity: Moderate
Ragweed continues into November or December without killing frost. Brazilian pepper tree blooms from September through November, producing both allergenic pollen and volatile oils that irritate airways — this invasive species is pervasive throughout St. Lucie County's natural areas, canal banks, and vacant lots. Mold remains elevated as the wet season tapers through October. By late November, humidity drops modestly, providing the closest approximation of an allergy break. However, the transition into winter tree pollen season means December brings the return of Australian pine and cypress pollen, keeping the allergen cycle continuous for sensitive individuals.
Port St. Lucie's location on Florida's Treasure Coast means humidity is the single most important factor driving your indoor allergen exposure. Average relative humidity exceeds 70 percent for much of the year, regularly reaching 80 to 90 percent during summer months. This humidity is not just uncomfortable — it directly fuels dust mite populations, mold growth, and the persistence of airborne allergens indoors. Running air conditioning with a dehumidifier setting or a standalone dehumidifier to keep indoor humidity below 50 percent is the most impactful single action Port St. Lucie allergy sufferers can take. HVAC systems should be serviced twice yearly with particular attention to condensation drain lines and cooling coils, which are the primary sites of indoor mold colonization in Florida homes.
Port St. Lucie is bisected by the North Fork of the St. Lucie River and sits adjacent to the Indian River Lagoon — North America's most diverse estuary spanning 156 miles along Florida's east coast. These waterways create a persistent humidity corridor through the center of the city. Homes near the river, canals, and lagoon-adjacent areas experience higher ambient humidity and greater mold exposure than inland neighborhoods. The thousands of residential canals throughout Port St. Lucie's master-planned communities create additional microenvironments where moisture levels remain elevated. If you live near water and experience chronic nasal congestion, postnasal drip, or recurring sinus infections, mold sensitivity is a leading suspect that a board-certified allergist can identify through blood testing.
Port St. Lucie's metro area has been the second-fastest growing metropolitan area in the nation among cities with at least half a million people. The population has surged more than 30 percent since 2020, with massive construction activity across the Tradition, Tesoro, Portofino, and other master-planned developments. This construction disturbs sandy Florida soil containing dormant mold spores and creates bare earth that allergenic pioneer weeds — pigweed, ragweed, Spanish needle, and dog fennel — colonize aggressively. Each new development adds acres of irrigated Bahia and Bermuda grass sod. Newly planted ornamental trees will increase tree pollen loads as they mature. If you moved to Port St. Lucie recently and developed allergies you never had before, the combination of unfamiliar subtropical allergens and construction-disturbed soil is the likely explanation.
Port St. Lucie was directly hit by three hurricanes in 2004 and 2005 — Frances (Category 2), Jeanne (Category 3), and Wilma (Category 3). These storms caused widespread roof and structural damage that allowed water intrusion into walls, attics, and crawl spaces. Despite repairs, hidden moisture in building materials can support mold growth for years or even decades. Older Port St. Lucie homes (pre-2006) should be evaluated for hidden mold if occupants experience chronic allergic symptoms that worsen indoors. Even homes that appear structurally sound may harbor Stachybotrys (black mold), Aspergillus, or Penicillium colonies behind drywall, under flooring, or in attic insulation that was wetted during storms and never fully dried.
Brazilian pepper tree (Schinus terebinthifolia) is one of Florida's most aggressive invasive species, and it infests over 700,000 acres statewide including large areas throughout St. Lucie County's natural lands, canal banks, highway medians, and vacant lots. Brazilian pepper is in the same family as cashew and mango, and it produces both allergenic pollen during its September through November bloom period and volatile aromatic oils that cause respiratory irritation and contact dermatitis. Many Treasure Coast residents develop sensitivity to Brazilian pepper without realizing the connection between their fall symptoms and this ubiquitous invasive tree. If your allergies flare specifically during autumn, Brazilian pepper should be considered alongside ragweed as a potential trigger.
HeyAllergy provides telemedicine appointments with board-certified allergists and immunologists licensed in Florida — no need to drive south to Palm Beach or north to Melbourne for specialist care. Book a virtual consultation from your Port St. Lucie home, have allergy blood tests ordered at a convenient local lab, and receive a personalized treatment plan targeting the specific mix of oak, Bahia grass, ragweed, mold, dust mites, Brazilian pepper, or pet dander driving your symptoms. HeyPak sublingual immunotherapy drops ship directly to your door and treat the root cause of allergies by building immune tolerance to your triggers. Most patients notice improvement within 3 to 6 months. Starting at $47 per month. HeyAllergy accepts Medicare and most major PPO health plans.
April through June is typically the worst period, with overlapping oak and pine tree pollen, rising Bahia and Bermuda grass pollen, and increasing mold spores as the rainy season begins. February through April brings peak oak pollen. August through November adds ragweed and Brazilian pepper tree pollen. Mold is elevated year-round due to subtropical humidity.
The most common allergens are oak, pine, Australian pine, Bahia grass, Bermuda grass, ragweed, mold (Alternaria, Cladosporium, Aspergillus), dust mites, Brazilian pepper tree, and pet dander. Port St. Lucie's subtropical humidity makes mold and dust mites particularly significant year-round triggers that many residents underestimate.
Florida's subtropical climate exposes newcomers to allergens they never encountered in northern states, including Australian pine, Bahia grass, Brazilian pepper, and year-round mold. The high humidity fuels dust mite populations that far exceed what exists in drier climates. Port St. Lucie's massive construction boom also disturbs soil containing mold spores and creates conditions for allergenic weeds. Many transplants who thought Florida would improve their allergies discover new triggers instead.
Yes. HeyAllergy provides telemedicine appointments with board-certified allergists and immunologists licensed in Florida. Book a virtual consultation from anywhere in the state, have allergy blood tests ordered at a local lab, and start a personalized treatment plan without visiting a clinic. No referral needed and no waitlist.
HeyPak sublingual immunotherapy uses customized liquid drops placed under your tongue daily containing precise doses of the specific allergens triggering your symptoms — whether oak, Bahia grass, ragweed, mold, dust mites, or pet dander. Over time, your immune system builds tolerance, reducing allergic reactions and medication dependence. Most patients notice improvement within 3 to 6 months.
HeyAllergy accepts Medicare and most major PPO health plans, including United Healthcare, Health Net, Anthem Blue Cross, Blue Shield, Cigna, Aetna, Humana, Oscar, and Tricare. Contact your insurance provider with Tax ID: 85-0834175 to confirm your specific telemedicine coverage.
Effectively yes. The subtropical climate means tree pollen starts in January, grass pollen runs April through October, ragweed extends August through December, Brazilian pepper blooms September through November, and mold is elevated year-round. Dust mites thrive continuously in Port St. Lucie's high humidity. There is no true allergy-free season on the Treasure Coast.
Mold is one of the most significant allergens in Port St. Lucie. The combination of 55+ inches of annual rainfall, subtropical humidity regularly exceeding 70 percent, warm temperatures, proximity to the St. Lucie River and Indian River Lagoon, and residential canal systems creates persistent mold exposure both indoors and outdoors. Hurricane damage history in older homes adds hidden mold risk. A board-certified allergist can test for mold sensitivity and develop a comprehensive treatment plan.
Port St. Lucie — population approximately 270,000 and growing at 5 percent annually — is one of America's most remarkable growth stories and Florida's sixth-largest city. The Port St. Lucie metropolitan area has been the second-fastest growing metro in the nation among areas with at least half a million people, adding over 50,000 residents since 2020. Founded in 1961 when a bulldozer cleared pine scrub for a master-planned community, Port St. Lucie has transformed from empty Treasure Coast flatland into a sprawling suburban city spanning over 120 square miles. That explosive growth, combined with the Treasure Coast's subtropical climate, creates an allergen environment that challenges both longtime residents and the thousands of newcomers arriving each year from northern states who expected Florida sunshine to cure their allergies.
Port St. Lucie sits in the broad transition zone between Central Florida's humid subtropical climate and South Florida's tropical climate. This geographic positioning has profound allergy implications. The city receives over 55 inches of rainfall annually, with a pronounced wet season from May through October when daily afternoon thunderstorms are routine. Average relative humidity exceeds 70 percent for much of the year, regularly reaching 80 to 90 percent during summer months. Winter temperatures rarely dip below freezing, meaning there is no hard frost to kill pollen-producing plants or reset the allergen cycle the way northern winters do. This creates what is effectively a year-round allergy season — when one allergen subsides, another takes its place without the seasonal gaps that provide relief in temperate climates.
Port St. Lucie is defined by water. The North Fork of the St. Lucie River winds through the city's heart, connecting to the Indian River Lagoon — North America's most diverse estuary, designated by the EPA as an estuary of national significance, with over 4,000 plant and animal species. While ecologically extraordinary, this waterway system creates a persistent humidity corridor through the center of the city that significantly impacts allergen exposure. The thousands of residential canals throughout master-planned communities like St. Lucie West, Tradition, and the original General Development Corporation neighborhoods add moisture to the local microclimate. Homes near waterways experience higher ambient humidity, more aggressive mold growth, and greater exposure to the organic decomposition that fuels mold spore production. The lagoon's mangrove forests, while critical for ecosystem health, contribute to the organic matter cycle that supports mold and fungal allergen production along the waterfront.
Florida's invasive species problem directly impacts Treasure Coast allergies. Australian pine (Casuarina equisetifolia) was planted throughout coastal areas as a windbreak and ornamental, and has established dense stands along the Indian River Lagoon, canals, and disturbed areas throughout St. Lucie County. Despite its name, Australian pine is not a true pine — it produces wind-dispersed pollen during winter months that causes significant allergic reactions in sensitized individuals. Brazilian pepper tree (Schinus terebinthifolia) infests over 700,000 acres across Florida, including extensive areas throughout St. Lucie County's natural lands, canal banks, and vacant lots. Related to cashew and mango, Brazilian pepper produces allergenic pollen and volatile oils that cause both respiratory irritation and contact dermatitis during its September through November bloom period. Melaleuca (paperbark tree), though more common in South Florida, is also present in the region and produces allergenic pollen. These invasive species add allergen burdens that did not exist when the area was native pine scrub and coastal hammock.
Port St. Lucie's population surge has driven massive construction activity across the city. The Tradition community alone encompasses over 8,000 acres of former cattle ranch that is being developed into residential, commercial, and civic uses. Tesoro, Portofino, and dozens of other developments are converting former agricultural and natural land into suburban communities. This construction activity disturbs Florida's sandy soil, releasing dormant mold spores from species including Alternaria, Cladosporium, and Aspergillus into the air. Bare earth at construction sites is rapidly colonized by allergenic pioneer weed species — pigweed, ragweed, Spanish needle, and dog fennel — that produce heavy pollen loads in disturbed conditions. Each completed development adds acres of irrigated sod, primarily Bahia and Bermuda grass, creating dense grass pollen sources. Newly planted ornamental trees including oak, palm, and various tropical species will add increasing tree pollen loads as the urban forest matures over coming decades.
Port St. Lucie was directly hit by three hurricanes in consecutive years — Frances (Category 2, September 2004), Jeanne (Category 3, September 2004, following nearly the same path just three weeks later), and Wilma (Category 3, October 2005). These storms caused catastrophic wind and water damage throughout the city. While most structural repairs were completed in the years following, hidden moisture that infiltrated walls, attics, roof decking, and subfloor assemblies during these storms can support mold colonization for years or even decades. Stachybotrys chartarum (black mold), Aspergillus, Penicillium, and Chaetomium species thrive in building materials that were wetted and never fully dried. Residents of pre-2006 Port St. Lucie homes who experience chronic nasal congestion, recurring sinus infections, or worsening respiratory symptoms indoors should consider hidden mold as a potential cause. Professional mold inspection and remediation may be warranted alongside allergy treatment.
HeyAllergy connects Port St. Lucie residents with board-certified allergists and immunologists licensed in Florida — providing specialist allergy care without driving south to Palm Beach County or north to Brevard for an allergist appointment. The Treasure Coast has historically been underserved for allergy specialists relative to its rapidly growing population. A virtual consultation from your Port St. Lucie home eliminates waiting rooms and scheduling delays. Allergy blood tests are ordered at a convenient local lab, and a personalized treatment plan is developed based on your specific triggers — whether oak, Bahia grass, ragweed, mold, dust mites, Brazilian pepper, or pet dander. HeyPak sublingual immunotherapy drops ship directly to your door and treat the root cause of allergies by building your immune system's tolerance to the specific allergens driving your symptoms. In a city with effectively year-round allergen exposure, treating the underlying immune sensitivity is far more effective than cycling through seasonal over-the-counter medications. HeyAllergy accepts Medicare and most major PPO health plans. Starting at $47 per month, with most patients noticing improvement within 3 to 6 months.
